HT250 gray iron is generally used as pad iron for vertical milling machine. HT250 gray cast iron has good strength, wear resistance, heat resistance, good vibration damping and casting performance, so it needs artificial aging treatment. It can be used for pump shell, vessel, tower, flange, stuffing box body and gland, carbonization tower, nitration tower, etc. it can also be used to make machine tool bed, column, cylinder, gear and parts requiring surface quenching. Because of its small thermal deformation, it is often used in high temperature occasions.
The third reason is that there is no iron pad installed properly. For these three reasons, let's take a specific look. First of all, overload. The weight of the pad iron itself is limited. If the weight of the vertical milling machine to be installed far exceeds the bearing capacity of the pad iron, the pad iron will be easily damaged. Let's talk about quality. The quality of the pad iron itself is not up to standard. Due to the poor material, it can not reach the capacity. Improper installation process. When the vertical milling machine is installed, the force must be fully considered. When the force is unbalanced, the uneven gravity of the pad iron is easy to damage.
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